--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/Modules/string_names.cpp	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,10 @@
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -fmodules-decluse -I %S/Inputs/string_names %s -fmodule-name="my/module-a" -verify
+
+// Check that we can preprocess with string module names.
+// RUN: %clang_cc1 -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -I %S/Inputs/string_names %s -fmodule-name="my/module-a" -E -frewrite-imports -o %t/test.ii
+// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-decluse -I %S/Inputs/string_names %t/test.ii -fmodule-name="my/module-a"
+
+#include "a.h"
+#include "b.h" // expected-error {{does not depend on a module exporting}}
+#include "c.h"